Input interpretation
![quinupristin | molar mass](../image_source/ed6afae6f8c00a82e7c712b7705edf42.png)
quinupristin | molar mass
Result
![Find the molar mass, M, for quinupristin: M = sum _iN_im_i Plan: • Write the chemical formula and gather atomic masses from the periodic table. • Determine values for N_i and m_i using these items. • Finally, compute the mass. Write the chemical formula: C_87H_117N_13O_19S_2 Use the chemical formula, C_87H_117N_13O_19S_2, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 87 H (hydrogen) | 117 N (nitrogen) | 13 O (oxygen) | 19 S (sulfur) | 2 Look up the atomic mass, m_i, in g·mol^(-1) for each element in the periodic table: | N_i | m_i/g·mol^(-1) C (carbon) | 87 | 12.011 H (hydrogen) | 117 | 1.008 N (nitrogen) | 13 | 14.007 O (oxygen) | 19 | 15.999 S (sulfur) | 2 | 32.06 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molar mass, M: Answer: | | | N_i | m_i/g·mol^(-1) | mass/g·mol^(-1) C (carbon) | 87 | 12.011 | 87 × 12.011 = 1044.957 H (hydrogen) | 117 | 1.008 | 117 × 1.008 = 117.936 N (nitrogen) | 13 | 14.007 | 13 × 14.007 = 182.091 O (oxygen) | 19 | 15.999 | 19 × 15.999 = 303.981 S (sulfur) | 2 | 32.06 | 2 × 32.06 = 64.12 M = 1044.957 g/mol + 117.936 g/mol + 182.091 g/mol + 303.981 g/mol + 64.12 g/mol = 1713.09 g/mol](../image_source/8c8f4a7eeeeef5f54342ff32cdaa3144.png)
Find the molar mass, M, for quinupristin: M = sum _iN_im_i Plan: • Write the chemical formula and gather atomic masses from the periodic table. • Determine values for N_i and m_i using these items. • Finally, compute the mass. Write the chemical formula: C_87H_117N_13O_19S_2 Use the chemical formula, C_87H_117N_13O_19S_2, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 87 H (hydrogen) | 117 N (nitrogen) | 13 O (oxygen) | 19 S (sulfur) | 2 Look up the atomic mass, m_i, in g·mol^(-1) for each element in the periodic table: | N_i | m_i/g·mol^(-1) C (carbon) | 87 | 12.011 H (hydrogen) | 117 | 1.008 N (nitrogen) | 13 | 14.007 O (oxygen) | 19 | 15.999 S (sulfur) | 2 | 32.06 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molar mass, M: Answer: | | | N_i | m_i/g·mol^(-1) | mass/g·mol^(-1) C (carbon) | 87 | 12.011 | 87 × 12.011 = 1044.957 H (hydrogen) | 117 | 1.008 | 117 × 1.008 = 117.936 N (nitrogen) | 13 | 14.007 | 13 × 14.007 = 182.091 O (oxygen) | 19 | 15.999 | 19 × 15.999 = 303.981 S (sulfur) | 2 | 32.06 | 2 × 32.06 = 64.12 M = 1044.957 g/mol + 117.936 g/mol + 182.091 g/mol + 303.981 g/mol + 64.12 g/mol = 1713.09 g/mol
Unit conversion
![1.7131 kg/mol (kilograms per mole)](../image_source/1f4737652baa2f7a7a32a7615156a622.png)
1.7131 kg/mol (kilograms per mole)
Comparisons
![≈ 2.4 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/6d0b8d6724951033931728c0bbec8eec.png)
≈ 2.4 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 8.8 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/cdbee53f081afb05b6d259b2ec51f6e6.png)
≈ 8.8 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 29 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/ed5efe27108a4eb38c9e9be9ed746114.png)
≈ 29 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 2.8×10^-21 grams | 2.8×10^-24 kg (kilograms) | 1713 u (unified atomic mass units) | 1.7 kDa (kilodaltons)](../image_source/bf69a1df4ca72edf7b4f18106f04037a.png)
Mass of a molecule m from m = M/N_A: | 2.8×10^-21 grams | 2.8×10^-24 kg (kilograms) | 1713 u (unified atomic mass units) | 1.7 kDa (kilodaltons)
![Relative molecular mass M_r from M_r = M_u/M: | 1713](../image_source/dcf3b6fe93e52d0b24cd9b8e5cb66267.png)
Relative molecular mass M_r from M_r = M_u/M: | 1713